The Effect of Size on Using Magic Items?Maybe not "carrying capacity" but "reasonable ability to carry". And this does kind of make sense. Imagine I decided to make a defensive tower with a Fireball wand infused in a tree trunk. The wand part would limit the possible users and the tree trunk part would limit the people who could carry it :)

In what ways can I make my character Huge without changing his form?Extra note about Psychic Expansion is that you can also use the 10 minutes / level by spending an extra 2 points. So 9 points (at level 9) you can become Huge for 3 hours. At higher levels, that time goes up, so while not "permanent", a higher level psychic warrior can be Huge for most of the day.

Average/optimal AC for core classes per level@starwed So the Mithril Buckler is actually a good cheat, that sidesteps all of the proficiency rules and the arcane spell failure rules. That stated it costs 2k for a +2, so it is expensive, for the same relative gold cost, it is adding a +1 to AC, possibly +2. It's also subject to some DM decisions around requirements for Somatic casting. General rules seem to be that you need one hand available for the somatic component and the buckler is clear that you lose its bonus when you use that hand. So if you use a Rod to cast, you lose the AC bonus.